scholarly journals Effects of polders on the course of floods in the watershed of the Tichá Orlice river

2008 ◽  
Vol 56 (4) ◽  
pp. 135-142
Author(s):  
Vladimír Pavlík
Keyword(s):  
Water Management ◽  
Flood Control ◽  
Control Measures ◽  
Protective Function ◽  
The Czech Republic ◽  
Small Water ◽  
Research Activities ◽  
Management Function ◽  
Basin Water

Polders show an important water-management function in the flood-control protection of watersheds. The course of actual floods in recent decades and effects of the water works on flood flows have proved the suitability of the construction within integrated flood-control measures in particular watersheds of the Czech Republic. To determine the transformation effect of flood-control measures in watersheds mathematical modelling is an important method, which is used not only in the preparation and design of retention areas but also in dealing with the flood protection of towns and villages. Easy verification of other measures in watersheds is also useful. Their implementation can be thus prepared for the future or it is possible to back off the intentions. In our case, a fact is advantageous that the model is ope­ra­ted in the workplace of the Elbe Basin water-management dispatching centre, which is compatible with assessed polders in the partial Elbe watershed, namely in the Tichá Orlice watershed and its partial Třebovka watershed. The polders assessed are situated on the Třebovka stream, which is the lar­gest tributary of the Tichá Orlice river. These dry reservoirs and the increased protective function of the Hvězda pond affect runoff from about 80 km2. Within research activities, possibilities were studied to obtain necessary retention areas in existing small water reservoirs. It became evident that the only rea­lis­tic solution was to increase protective functions of the pond Hvězda. Its present total retention space of 1.4 million m3 can be increased only by 0.35 million m3, however, in combination with the sophisticated lay-out of a new emergency spillway and outlet the whole retention space can be used much more effectively. To obtain other retention areas localities were found out in the whole upper watershed of the Třebovka stream, which fulfilled requirements for placing the adequate capacity of polders. Subsequent modifications of the Třebovka channel in the most endangered villages and towns and their capacity design according to transformation effects of selected reservoirs and measures, determination of their effect and comparison with profiles on the Tichá Orlice are the content of the paper.

scholarly journals Forestry, mountain catchments and floods in the Czech Republic

2012 ◽  
Vol 50 (No. 11) ◽  
pp. 538-541
Author(s):  
M. Bíba ◽  
J. Jiřík ◽  
K. Vančura
Keyword(s):  
Czech Republic ◽  
Flood Control ◽  
Atmospheric Precipitation ◽  
Control Measures ◽  
Human Beings ◽  
Forest Environment ◽  
The Czech Republic ◽  
Local Climate ◽  
Mountain Catchment ◽  
Catchment Areas

A short introduction of historical overview and current situation refer to forestry problems of the country. Local climate is characterized and impacts of natural phenomena are described, as well as the impacts of human beings. The influence of forest management is mentioned and discussed in relation to latest catastrophic floods. The territory of the Czech Republic is damaged especially by a high intensity of atmospheric precipitation abnormal values which lead to a local or regional damage. In the catchment areas of torrents, damage leads to faster soil erosion, development of ravines, landslides, moving of soil sediments and their deposition, devastation of watercourse beds and properties, flooding while the flooding rates of flow represent a danger for the life of inhabitants. Important elements and results of respective research are described in brief. E.g. research of precipitation and its relation to the runoffs in the small mountain catchment areas with the forest stands restoration, as well as the forestry-hydrologic monitoring of forest environment, which has been taking place since 1928, and tradition of the service for torrent control. Forestry-hydrologic research gradually documents that a favorable flood-control performance of forest is limited. However, this is not a reason for not taking care of flood-control measures in the mountain afforested areas. These measures and importance of forest for the protection of land are historically verified and justified. In closing the mankind behavior to the landscape is underlined as a question mark.

scholarly journals Determination of potential retention of the Fryšávka River basin

2010 ◽  
Vol 58 (5) ◽  
pp. 263-270 ◽  
Author(s):  
Tomáš Mašíček ◽  
František Toman
Keyword(s):  
River Basin ◽  
Flood Control ◽  
Water Retention ◽  
Curve Number ◽  
Control Measures ◽  
Design Parameters ◽  
Software Products ◽  
Software Applications ◽  
Integrated Software

Hydrological models provide design parameters for the design of flood control measures. Runoff from the river basin is primarily determined by the amount of rainfall and water retention of the river basin. The Fryšávka River basin was chosen to determine the potential water retention of the river basin. Before the determination of potential retention preparatory work was carried out: description of the current state of land cover based on a detailed field survey, the representation of hydrological soil groups in the basin found in BPEJ (Bonitované půdně ekologické jednotky – Valuated land–ecological units) maps, delimitation of basin parts by the digital vector layer ZABAGED altimetry (Základní báze geografických dat – Fundamental base of geographic data) – 3D contour and evaluation of basin parts by the runoff curve numbers (CN). The processing of background data was performed by the program ArcGIS 9.2 of ArcView software products using a set of integrated software applications ArcMap, ArcCatalog and ArcToolbox. To assess the potential retention, as part of the hydrologic cha­ra­cte­ri­stics of the Fryšávka River basin, the curve number method, a modification of the deterministic episode model DesQ–MAXQ, was used. The average numbers of runoff curves and the data about potential retention of river basin parts are presented in the form of map outputs.

scholarly journals Recreational potential of the regulated watercourse Ostravice river in Ostrava urban area

Beskydy ◽  
2014 ◽  
Vol 7 (2) ◽  
pp. 69-80
Author(s):  
I. Lampartová ◽  
J. Schneider
Keyword(s):  
Urban Area ◽  
Flood Control ◽  
Developed Countries ◽  
Control Measures ◽  
The Czech Republic ◽  
Land Usage ◽  
Landscape Water ◽  
Urban Settlements ◽  
The Subject ◽  
Sanitary Conditions

Water coursess are segments in the country increasing its recreational potential. The current goal of revitalization measures in the landscape primarily consists of the optimization of landscape water regime, incl. flood control measures and the promotion of biodiversity, but the current philosophy speaks of multifunctional land usage. In the society there has been indicated the necessity for recreation, because a large part of the population lives in urban settlements and is employed in an artificial technical environment that has largely inadequate sanitary conditions (unfavourable microclimate, noise, dust, etc.). Recreation as a social phenomenon is therefore a permanent part of the lifestyle in economically developed countries. However, the revitalization is currently underappreciated in the Czech Republic and it is important to increase recreational potential of the landscape. The subject of this article is evaluation of regulated watercourse Ostravice river in Ostrava urban area. The model area of river Ostravice in Ostrava region is described here. In the model area is evaluated some elements of recreational potential of revitalization by the proposed methodology. The outcome of the work is to propose an ongoing systematic procedure for assessment of the relevance of revitalization actions in terms of the recreational potential of the landscape and their impact on the development opportunities of the region.

scholarly journals An Analysis of Transboundary Water Resources: A Case Study of River Brahmaputra

1970 ◽  
Vol 7 (1) ◽  
pp. 135-141
Author(s):  
Debi Prasad Bhattarai
Keyword(s):  
Water Management ◽  
Water Supply ◽  
River Basin ◽  
Flood Control ◽  
Management Strategies ◽  
Integrated Approach ◽  
Control Measures ◽  
Brahmaputra River ◽  
Transboundary Water Resources ◽  
Political Boundaries

The need for water management on hydrological boundaries is mainly triggered by the growing competition for water or by the need to cooperate in an upstream downstream relation. For an institution operating on political boundaries, not coinciding with the boundaries of the river basin, it is very difficult to allocate or prioritise water or carry out flood control measures. A system of water management on political boundaries will induce the respective authorities to either monopolise the water supply sources within its area and to transfer the problem of flooding to downstream. In this article it is attempted to explore the major transboundary issues that need to be addressed in the whole Brahmaputra River basin. Sharing of resources, sharing of basic data and information and protection and preservation of ecosystem are identified as three major issues. In this context, controversial legal issues between the riparian nations in the past were also analysed which has triggered the scope for integrated approach to manage the Brahmaputra River basin. In the later part of the article, a critical analysis was made to understand the principles, approaches and instruments to address the above problems. Finally, some legal materials are presented which could be used as a basis for solving the major river basin issues.Key words: water management; diversifying water supply sources; water management strategies; NepalJournal of the Institute of Engineering, Vol. 7, No. 1, July 2009, pp. 135-141doi: 10.3126/jie.v7i1.2072

scholarly journals Flood Transformation Effect of a System of Small Water Reservoirs

2015 ◽  
Vol 63 (5) ◽  
pp. 1581-1586
Author(s):  
Václav Tlapák ◽  
Petr Pelikán ◽  
Pavla Pilařová
Keyword(s):  
Work Experience ◽  
Water Discharge ◽  
Retention Volume ◽  
Water Reservoir ◽  
Water Reservoirs ◽  
The Czech Republic ◽  
Small Water ◽  
Proper Design ◽  
Retention Volumes

The paper resumes the investigation of transformation of watershed flow off caused by retention volumes of small water reservoirs (SWR) in landscape. Based on our work experience in the field of water reservoir design and research, we know that simple system of even small fishponds disposes of nonnegligible free retention volume. We decided to verify this assumption with aid of exact determination of discharge transformation within the basin containing realized system of small water reservoirs. The input water management data for design of water reservoirs are represented by water discharge in existing stream related to the point of designed SWR. In the Czech Republic, the data are provided by the Czech Hydrometeorological Institute (CHMI), however the data refer to an unaffected discharges, i.e. without consideration of transformation effects of existing small water reservoirs within the basin. Although the total available volume for transformation purposes of investigated SWR system is relatively small, the results show the transformation effect of such reservoirs is not insignificant. Furthermore the transformation effect is raised by proper design and functionality of the whole system of water reservoirs.

scholarly journals Possibilities of Evaluation of the Recreational Potential of Close to Nature Watercourses

2014 ◽  
Vol 62 (4) ◽  
pp. 799-809
Author(s):  
Ivana Lampartová ◽  
Jiří Schneider
Keyword(s):  
Urban Space ◽  
Flood Control ◽  
Water Regime ◽  
Point Of View ◽  
Control Measures ◽  
The Czech Republic ◽  
Land Usage ◽  
Rich Diversity ◽  
Landscape Water ◽  
The Subject

Creation of close-to-nature river beds is one of the results of watercourses revitalization. Watercourses are segments in the country increasing its recreational potential.The recreational potential of watercourses contributes to rich diversity of animal and plant species. They are well-preserved natural environment with a different atmosphere and an interesting psychological effect. The current goal of revitalization measures in the landscape primarily consists of the optimization of landscape water regime, incl. flood control measures and the promotion of biodiversity, but the current philosophy speaks of multifunctional land usage. However, the revitalization is currently underappreciated in the Czech Republic and it is important to increase the recreational potential of the landscape. The subject of this article is evaluation of close to nature watercources from the point of view of recreation potential. The example locality of close to nature watercourse is part of Váh river near Iľava city. In this area some elements of recreational potential by the proposed methodology are discussed. Two river courses make a possible comparison between a technical canal and a modified one, but close-to-nature water course with all parameters of river phenomenon. Properties of nature and close-to-nature watercourses could be an inspiration for repairing(modifying, adjusting) river stretches within urban space.

scholarly journals Investigation of Role of Retention Storage in Tanks (Small Water Bodies) on Future Urban Flooding: A Case Study of Chennai City, India

Water ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2875
Author(s):  
N. Nithila Devi ◽  
B. Sridharan ◽  
V. M. Bindhu ◽  
B. Narasimhan ◽  
S. Murty Bhallamudi ◽  
...  
Keyword(s):  
Land Use Planning ◽  
Flood Control ◽  
Control Measure ◽  
Extreme Rainfall ◽  
Control Measures ◽  
Water Bodies ◽  
Small Water ◽  
Modelling Framework ◽  
Chennai City ◽  
The Impact

The Adyar River flowing through Chennai Metropolitan Area (CMA) in Southern India functions as a surplus course of upstream water bodies that are locally known as tanks. During northeast monsoons, the river frequently floods the adjoining city areas. In this study, the impact of dredging and disappearance of tanks on flooding in CMA is analyzed under historical, urbanization, and extreme rainfall scenarios utilizing an urbanization-hydrologic-hydraulic modelling framework. The simulated scenarios highlight the importance of the tanks as a flood control measure for CMA. The major conclusions are (a) dredging the tanks uniformly by 2 m can compensate the increase in flooding due to urbanization by 2050 for 1 in 50-year rainfalls and, (b) for disappearance of tanks, 1 in 50-year rainfall can inundate the city akin to 1 in 100-year rainfalls. The study can be useful for making informed decisions on dredging the tanks, land use planning, and flood control measures for the CMA.

Evolution of Microclimatic Conditions in Paskov Mine / Ewolucja Warunków Mikroklimatycznych W Kopalni Paskov

2012 ◽  
Vol 57 (4) ◽  
pp. 1045-1055
Author(s):  
Pavel Zapletal ◽  
Pavel Prokop ◽  
Vítězslav Košňovský
Keyword(s):  
Coal Mining ◽  
Mining Activity ◽  
Mining Engineering ◽  
Special Program ◽  
Main Subject ◽  
Coal Basin ◽  
Research Activities ◽  
Microclimatic Conditions ◽  
Technical University

Abstract The main subject of this paper focuses on scientific and research activities conducted in the Institute of Mining Engineering and Safety of the VŠB-Technical University of Ostrava. Cooperation between the VŠB-Technical University of Ostrava and OKD A.S., the only representative of coal mining in the Ostrava-Karviná coal basin, has recently begun to develop again. This paper describes an example discussed in a certain study, which has been undertaken for the Paskov mine, OKD a.s., dealing specifically with the evolution of microclimate parameters in mines that depend on the progress of mining activity at deeper levels over a period of several years. To this end, a special program, aimed at determination of the necessary refrigerating capacity, was established at the VŠB-Technical University of Ostrava.

scholarly journals Research of the Disparities in the Process of Revitalization of Brownfields in Small Towns and Cities

2021 ◽  
Vol 13 (3) ◽  
pp. 1232
Author(s):  
Natalie Szeligova ◽  
Marek Teichmann ◽  
Frantisek Kuda
Keyword(s):  
Small Towns ◽  
The Czech Republic ◽  
Essential Step ◽  
Community Strength ◽  
Population Turnover ◽  
Subsequent Application ◽  
Level Of Knowledge ◽  
The Subject ◽  
Relevant Factors

The subject of the work is the research on relevant factors influencing participation in the success of brownfield revitalization, especially in the territory of small municipalities. Research has so far dealt with the issue of determining disparities in the municipalities of the Czech Republic, not excluding small municipalities, but their subsequent application has usually been presented in larger cities. The focus on smaller municipalities or cities was usually addressed only in general. The introduction provides an overview of theoretical knowledge in the field of brownfield revitalization. Defining the level of knowledge of the monitored issues is an essential step for the purposes of more effective determination of disparities. Disparities will be determined on the basis of information on localities that have been successfully revitalized. The identified disparities are then monitored in the territory of small municipalities. For the purposes of processing, it was determined that a small municipality or city is an area with a maximum of 5000 inhabitants. Using appropriately selected statistical methods, an overview of disparities and their weights is determined, which significantly affect the success of revitalization. In small municipalities, the issue of brownfields is not emphasized but, in terms of maintaining community strength and reducing population turnover, the reuse of brownfields is a crucial theme.

scholarly journals Dynamics of the Degradation of Acetyl-CoA Carboxylase Herbicides in Vegetables

Foods ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 405
Author(s):  
Miroslav Jursík ◽  
Kateřina Hamouzová ◽  
Jana Hajšlová
Keyword(s):  
Linear Models ◽  
Growing Season ◽  
Field Trials ◽  
Baby Food ◽  
Vegetable Production ◽  
The Czech Republic ◽  
Herbicide Residues ◽  
Harvest Intervals ◽  
Small Plot

(1) Background: Aryloxyphenoxy-propionates and cyclohexanediones are herbicides most widely used in dicot crops worldwide. The main objective of the study was to determine the dynamics of herbicide residues in carrot, lettuce, cauliflower, and onion in order to suggest a low level of residues in harvested vegetables. (2) Methods: Small plot field trials were carried out in four vegetables in the Czech Republic. The samples of vegetables were collected continuously during the growing season. Multiresidue methods for the determination of herbicide residues by LC-MS/MS were used. Non-linear models of degradation of individual herbicides in vegetables were calculated using the exponential decay formula. Action GAP pre-harvest intervals for the 25% and 50% maximum residue limit (MRL) and 10 µg kg−1 limit (baby food) were established for all tested herbicides. (3) Results: The degradation dynamics of fluazifop in carrot, onion, and cauliflower was significantly slower compared to quizalofop and haloxyfop. The highest amount (2796 µg kg−1) of fluazifop residues was detected in cauliflower 11 days after application. No residue of propaquizafop and cycloxydim was detected in any vegetable samples. (4) Conclusions: Aryloxyphenoxy-propionate herbicide (except propaquizafop) could contaminate vegetables easily, especially vegetables with a short growing season. Vegetables treated with fluazifop are not suitable for baby food. Lettuce and cauliflower treated by quizalofop are not suitable for baby food, but in onion and carrot, quizalofop could be used. Propaquizafop and cycloxydim are prospective herbicides for non-residual (baby food) vegetable production.

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